22272440661 has 48 divisors (see below), whose sum is σ = 34193016000. Its totient is φ = 13930824960.

The previous prime is 22272440651. The next prime is 22272440669. The reversal of 22272440661 is 16604427222.

22272440661 is a `hidden beast` number, since 2 + 227 + 24 + 406 + 6 + 1 = 666.

It is not a de Polignac number, because 22272440661 - 2¹¹ = 22272438613 is a prime.

It is a super-2 number, since 2×22272440661² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22272440669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18121795 + ... + 18123023.

It is an arithmetic number, because the mean of its divisors is an integer number (712354500).

Almost surely, 2^22272440661 is an apocalyptic number.

It is an amenable number.

22272440661 is a deficient number, since it is larger than the sum of its proper divisors (11920575339).

22272440661 is a wasteful number, since it uses less digits than its factorization.

22272440661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194 (or 2191 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

Adding to 22272440661 its reverse (16604427222), we get a palindrome (38876867883).

The spelling of 22272440661 in words is "twenty-two billion, two hundred seventy-two million, four hundred forty thousand, six hundred sixty-one".